Kinda new to GOG, so im still getting used to the UI. Thanks!

From the menu press the "Store" link to open the store page. Then from the "Search" bar, notice the "Filters" dropdown(upper right side of the store page). Press it to expand it's items, and then further expand the "Features" item. Finally check the "Achievements" option.

Or use this link :)

Edit: Just curious, your account is from 2013. Have you created it for a freebie, and only recently decided to buy games here? Anyway, welcome and enjoy your stay!