Hi Mary,
Several years ago, WikiTree and GEDmatch had set up integration so that WikiTree users that have entered their GEDmatch IDs on their DNA test info here can have a "Wiki" link associated with their GEDmatch ID on the match reports at GEDmatch. The "Wiki" link was a connection to the Compact Tree view of the WikiTree user. GEDmatch users could activate that functionality on the GEDmatch site by editing their kit there and enabling the "WikiTree Public Availability" feature.
I assume that's all still working on both ends. If so, you should be able to edit your kit at GEDmatch to enable that feature, and you shouldn't need to download/upload a GEDCOM file to accomplish that.