Gitcoin never did an ICO and doesnt have a token. During the 2017 ICO craze, we opted instead to just focus on product/community.
Our network supports any ERC20 token or ETH. Here are the top ones on the Gitcoin network https://gitcoin.co/leaderboard/tokens?cadence=all&keyword=al...
More on why we didnt do an ICO at https://gitcoin.co/not_a_token