On May 1, the EGPGC struck again with eight bombs, in banks of A Coruña, Compostela, Vigo, Betanzos and As Pontes de García Rodríguez, causing serious material damage.
The attacks were motivated by the social opposition to those plants due to the continuing uncontrolled dumping of waste in the Ría of Pontevedra, managing to paralyze the industries for two days.
In the same month, on the 27th, the EGPGC carried forward one of their most important attacks by destroying the summer residence of Manuel Fraga Iribarne, former Minister of Information and Tourism (1962–1969) during the dictatorship of Francisco Franco, MEP at the time by the Popular Alliance, and that only two years later would become president of Galicia.
The coincidence of the attack on Manuel Fraga with the murder of the A Coruña businessman Claudio San Martín by the First of October Anti-Fascist Resistance Groups (GRAPO), made the press speculate about the possibility of an intense relationship between the two organizations, which was discarded later by the police.
On August 31, 1988, the Guerrilla Army made a public manifesto with the title of New Galician Poetry (Nova Poesía Galega), which set as targets foreign companies, entities that manufacture in Galicia harmful products, drug traffickers, beneficiaries of burned wood in the hills during the common summer forest fires in Galicia and the fascist symbolism maintained since the death of Francisco Franco.
Despite significant members of EGPGC being in prison, the actions of the armed group continued to be directed against their usual targets, causing only material damage.
Just a week after sending the first statement, the EGPGC exploded seven bombs in Compostela, A Coruña, Ferrol and Vigo, against banks and the electric Unión Fenosa.
The decision of not to attack people's lives or physical integrity constituted a differential facts of the EGPGC on other armed groups acting at the time, like the maoist GRAPO, ETA in the Basque Country or Terra Lliure in Catalonia.
On February 2, 1989, the EGPGC starred, however, an important qualitative leap: a command formed by four militants attacked two Guardia Civil officers in the municipality of Irixoa.
[6] One of them, Ramón Piñeiro, member of the INTG nationalist union, said that the death have occurred "in random way" and that the goal of the operation was not murder the agent, but to steal their weapons.
The EGPGC continued, in effect, attacking industrial facilities and on December 18 bombed one electric tower near the Alumina-Aluminio factory in San Cibrán (Lugo), where the toxic products recovered from the Cason boat (sunk at A Costa da Morte) were relocated, which had produced a great social conflict in the region.
On 6 February, the Spanish police defused a bomb placed in a car of a dealer in A Coruña that was linked to the laundering of money from drug trafficking.
At the beginning of June that year, coinciding with the trials of various militants of the organization, the Guerrilla Army attacked Unión Fenosa and Telefónica facilities in Dozón and Ourense, respectively.
The group attacked narcos again on 11 October 1990: a bomb in a disco in Santiago de Compostela that should have exploded when the local was empty, was accidentally activated prematurely causing injuries of varying severity to 49 people and the death of three people, including two members of the EGPGC commando that were putting the bomb in the nightclub, owned by several drug traffickers, among them Oubiña Laureano and Manuel Charlin.
[9] The group also continued attacking industrial facilities: on March 1, 1991, five electricity towers were destroyed in O Bierzo; on July 10 explosives were placed in ENCE, Pontevedra.
[10] On September 21, 1991, the Spanish police arrested Manuel Chao and other members of EGPGC in the Franco-Spanish border in Catalonia, dismantling the organization.