I don't speak Spanish but you should be able to plug in a PCie-M to PCIe adapter and plug in a PCI gfx card. Or use an USB gfx card
and do you know the brend for the mini pci card for Galileo?
You can find different options of buying your Galileo in this link https://www-ssl.intel.com/content/www/us/en/do-it-yourself/where-to-buy.html . As for the mini PCI card I’d recommend you to look also at those websites and try to find the mPCI card in the related searches. Regards