LOL
Would you use a .gdn for your business ? For real ? If you cannot answer yes, you (and others) shouldn't be investing in .gdn in the first place. It's called the confidence test.
But maybe I can outline my thoughts better.
TLDs are brands. .com is a brand too. It is the brand of global commerce.
New extensions like .online .club .tech .blog .guru etc are semantically relevant, even if people are puzzled about new extensions, at least the TLD needs no explaining. Extensions should enhance/complement/reinforce the brand (left of the dot). .GDN brings no added value at all to your brand/company name.
For example investors.club makes sense, shopping.online makes sense, advanced.tech makes sense.
On the other hand a .gdn domain never makes any sense because the TLD is totally superfluous.
Of course you'll never see serious, meaningful sites on a meaningless extension like that. Almost all other extensions are better/less worse.
PS: same opinion about .xyz: a silly extension.