Born in England, he progressed through the youth system of Wimbledon, making his debut in the Football League First Division in October 2000 and played until their final season.
After a brief spell with Grays Athletic, he spent the remainder of his career with his hometown club Ascot United in the Hellenic Football League.
[citation needed] He joined Aldershot Town at the start of the 2007–08 season,[4] and was part of the side that won the Conference with a record points total.
[5] On 22 May 2008, Grays Athletic announced they had signed Gier on a one-year contract,[6] however, he was transfer listed by the club in January 2009, with financial pressures and manager Wayne Burnett's plans being cited as the reason.
[7] Gier joined Hellenic League Premier Division club Ascot United in November 2009, after being released at the end of the previous season by Grays Athletic.
[9] Gier was called up to the Philippines national team in March 2009, for the 2010 AFC Challenge Cup qualifiers in April, where they were due to face, Turkmenistan, Bhutan and the Maldives.
[10] He made his international debut in 2010 AFC Challenge Cup qualification match against Bhutan on 14 April 2009 and also played against Maldives and Turkmenistan.
The idea was concepted by Gier, after he met with the Philippine national youth team who had a three-week training camp in the UK in 2013.