I'm happy to announce that we've just released a new fix under the approved game fixes initiative we started last year for a long standing broken achievement from the game Counter-Strike Source, Gift Grab!

The fix is a server plugin which replicates the Gift Grab 2011 event that Valve had for the game in the old version of the game. This is accomplished by adding back in gift drops and also for counting them towards the Gift Grab achievement. The plugin is also fully open source available on GitHub and AlliedModders.

https://steamcommunity.com/sharedfiles/filedetails/?id=2296578058
I've got a server running now with the plugin which I'll keep up for a few months.
Server name for server browser: 100pAG - Gift Grab Achievement
Console command: connect 51.89.165.30:27015

This method is approved and endorsed by moderators of 100pAG and this group.