I can understand the interest in making a radio operate over the internet, from the point of view of a project, I must admit I can't see a use for the sort of interconnection a gateway gives, from an operational point of view.
When I came back on the radio, in 2001, I was looking at what changes had taken place and discovered G0PVR? gateway and had my one an only QSO of this type, with a VK.
Interesting technology but I couldn't actually see the point.
I do see the value of point to point remote control of your station and the ability to have remote connection to a receiver, in order to monitor propagation, has its uses but to conduct a QSO, where only the last small bits of the link are RF, is lost on me.
In much the same way, I understand repeaters, when it's mobiles using them, but at a loss when fixed stations do.
I'm rarely short of someone to speak to on VHF/UHF, without artificial assistance.
From my, occasional, observations many repeater QSOs would be perfectly possible direct.
I've even heard people remark that they can copy the other station on the input and still not QSY off the repeater.
M0BMN is only 83km from here so should be a good signal direct and M0NKA is only 95km so, again, should be no problem.
G1FNR is about 200km, very close to M0GHZ, a more difficult path from here but perfectly possible.
I'm not sure how it is that I've never worked any of you.
It could be that you are only on FM, of course, in which case our paths are unlikely to cross as I, generally, only use FM for the odd DX station and it would be with horizontal polarisation.
With regards to 2M I fully realise it's not as busy as it was in the mid, to late, 70's when I had my previous chance to be active.
In those days a CQ call, even at 2am, would usually get a reply and, on a busy day, it was difficult to find a bit of free space to slot into.
These days it's a bit more difficult to find daytime QSOs, particularly with mobiles, but there's usually someone around.
This is SSB, I don't use FM, and the stations are spread around the country, and near Europe.
M5PYE/M still waves the flag, I worked him a few days ago whilst he was driving along the M6 around Birmingham (about 110km from here).
His next QSO was with GD8EXI.
Not bad with a halo and flat band.
No repeaters involved, just 100W, of SSB, and a halo.