Are you sure it is on Bitget? I also have a Bitget account but I can't seem to find Gems under Launchpad it seems it's a newly added pair GEMS/USDT on spot exchange but not under Launchpad.
So possible it was under Launchpad before? If I'm right then I guess it's already ended.

What you can only do right now is to buy them directly on spot exchange on Bitget.