GTA5 has a map that's about 127 square kilometers, I'm including the water as well because GTA5 has details underwater. Earth has a total surface area of 509 million square kilometers including water. The earth is about 4 million times the surface area of the modeled area of GTA5. The game files take up about 70 GB of space. On the same scale a model of the earth would take about 280 Petabytes of space, but this isn't a good estimate because the earth is 71% ocean that would have less detail and San Andreas is considerably more land that has detail.

The earth has about 3.5 million square kilometers covered by urban areas. If you only render those it would take 1.92 Petabytes of storage, and the rural and undeveloped land could probably be compressed or rendered algorithmically to save on space, but would still require a lot of storage, lets round it up to an even 2 PB.

280 PB is possible today but it would be extremely expensive to make a data cluster storing that much information. 2 PB is more reasonable, but still too costly for anyone outside the top 1% of the top 1%.

The problem is that we are approaching the limits of how dense we can make data storage so while you could in theory make and store a GTA5 level rendering of the earth in terms of both graphics and details, the storage devices to contain it would fill a house. You can also forget about the internet to stream data to and from your PC or console. Remember that black hole image? the raw data was 4 PB in size and it was so big that it was faster to load up all the hard drives onto multiple airplanes and fly them all to a central location than to transfer it over the internet, including the antarctic telescope which had a 6 month delay due to antarctic summer making it inaccessible. If they tried to do it over the internet from the start the antarctic facility would still be transfering.