Tropico 2 seems to be missing from the store's list of games. Tropico 1 and 3-6 are all listed, but I can't find 2. Am I missing something, is the store bugged or has it been removed fro GOG?

Check Tropico Reloaded on gog since it's 2 games in one to buy here that is where Tropico 2 is.
There is no extra store page for tropico 2

This and some other games are hidden away in bundles like this and may not even be searchable, which is rather dumb by GOG.

As I have the bundle with the two first games I can confirm Tropico 2 is indeed here on GOG.

EDIT: I mean that the games are not searchable is a dumb move, not bundling them.