[4] Gy has an area, as of 2009[update], of 3.28 square kilometers (1.27 sq mi).

[10] Most of the population (as of 2000[update]) speaks French (336 or 90.8%), with German being second most common (12 or 3.2%) and English being third (11 or 3.0%).

[11] As of 2008[update], the gender distribution of the population was 47.3% male and 52.7% female.

The total Swiss population change in 2008 (from all sources, including moves across municipal borders) was an increase of 4 and the non-Swiss population increased by 10 people.

In the federal election, a total of 137 votes were cast, and the voter turnout was 58.5%.

[15] In the 2009 Grand Conseil election, there were a total of 253 registered voters of which 114 (45.1%) voted.

The most popular party in the municipality for this election was the Libéral with 23.7% of the ballots.

In the canton-wide election they received the highest proportion of votes.

[16] For the 2009 Conseil d'Etat election, there were a total of 254 registered voters of which 141 (55.5%) voted.

[10] There were 168 residents of the municipality who were employed in some capacity, of which females made up 42.3% of the workforce.

In 2008[update] the total number of full-time equivalent jobs was 69.

The number of jobs in the secondary sector was 16 of which 4 or (25.0%) were in manufacturing and 13 (81.3%) were in construction.

In the tertiary sector; 3 or 13.0% were in wholesale or retail sales or the repair of motor vehicles, 2 or 8.7% were in a hotel or restaurant, 2 or 8.7% were technical professionals or scientists, 2 or 8.7% were in education.

[10] From the 2000 census[update], 118 or 31.9% were Roman Catholic, while 98 or 26.5% belonged to the Swiss Reformed Church.

The education system in the Canton of Geneva allows young children to attend two years of non-obligatory Kindergarten.

The canton's school system provides two years of non-mandatory kindergarten and requires students to attend six years of primary school, with some of the children attending smaller, specialized classes.

There were 8 lower secondary students who attended school in Gy.