Use of Guild Emblems
There’s no way to get the guild emblems yet but to extract them from the gw2.dat. Dr Ishmael did that before, have a look at this post: https://forum-en.gw2archive.eu/forum/community/api/API-Suggestion-Guilds/2151144
We also don’t know exactly how to postprocess the images so that we can build 1:1 guild emblems, see the latest not-so-bad result i got over here: https://forum-en.gw2archive.eu/forum/community/api/API-Suggestion-Guilds/2155863
For some code have a look at this: https://github.com/codemasher/gw2api-tools/blob/master/examples/gw2emblems.php