In my daily work, I frequently switch between various applications like web browsers, email clients, messaging apps, and presentation tools — all of which require mouse interaction. Because of this, I no longer use GVim as a full IDE but rather for its original purpose: a powerful text editor.

Within this workflow, it's quite common to double-click a file to open it. However, I've noticed that doing so with text files launches a new instance of GVim each time, whereas I want to re-use running instances. I found a way forward to solve this issue that I describe in this gist and I hope it may be useful for someone in my same situation.