No way to query GameData and GameTags separately

[Kein]

According to always terrible valve docs, gamedata and gametags there are separate fields:
https://partner.steamgames.com/doc/api/ISteamMatchmakingServers#MatchMakingKeyValuePair_t
and
https://partner.steamgames.com/doc/api/ISteamGameServer#SetGameData
describes SetGameData and SetGameTags

The server I'm querying returns keywords data, which is array of KV pairs with : as a delimiter. However, I cant seems to query/use it with the available API steam.py povides:
https://steam.readthedocs.io/en/latest/api/steam.game_servers.html

Attempt to use it in gamedata[or] and gametype does not return any valid reasons and there is no gametagsand/or as per Valve's ISteamMatchmakingServers documentation.

[rossengeorgiev]

Never used any of these. Do you have an example server that uses them?