I am running a public instance of my Stargate Proxy, which lets you access HTTP/HTML from inside of Geminispace. HTML is translated to gemtext on-the-fly. Other features include converting images on-the-fly to formats, dimensions, and file sizes more appropriate for Gemini.
Various Gemini clients allow you to configure a proxy to use for HTTP. You can run that Gemini proxy on your local machine, and then use HTTP links directly inside your Gemini client. Of course, sometimes you don't want to do this (it's somewhat technical) or your can't (like running a proxy on your mobile device).
To help, I've setup a public instance of my Stargate proxy that anyone can use. Want to try it? Set Gemini's client to use HTTP proxy:
stargate.gemi.dev:1994
Now try accessing web content, such as this link:
Keep in mind this is a public proxy. I can see the URLs you are requesting. Don't be a jerk, try to access illegal stuff, or abuse it, and I'm happy to keep it running if people find it valuable.
Interested in other proxies? Want to run one own your own systems? Take a look at Duckling.