Many of the logos and graphics presented here are the property of their respective owners. Be respectful of the brands and their owners.
SVG files are provided as-is and most should work in-game as-is, i.e. being less than 15 kB in size and pretty "standard" when it comes to SVG features. If any of them doesn't work, feel free to open them up in your favorite vector art application and fix them, we can't provide any real "support" for using these logos in any way.
We do NOT provide any service of making these decals readily available in-game, instead you will have to upload decals yourself to Polyphony Digital's GT Sport website. Also, we do NOT take any responsibility for any warnings and/or bans you may incur for uploading and/or using these decals. Decals are uploaded into Gran Turismo Sport via their decal uploader, which you will find here: https://www.gran-turismo.com/gb/gtsport/user/decal-uploader
There is an excellent Youtube tutorial available from HSG Automotive which should apply in most aspects. You'll find it here: https://www.youtube.com/watch?v=AlxpqURaQyc
This catalog of SVG decals consists of 958 files. To download in a reasonably modern and standardized browser, simply click the logo. If you want to link a specific logo to someone, feel free to use the link in the little link icon in the top left corner, so they can find more decals if they so wish.