$ ver & vips --version
Microsoft Windows [Version 6.1.7601]
vips-8.15.1

$ cat image.svg
<svg
  xmlns="http://www.w3.org/2000/svg"
  width="32"
  height="32"
  viewBox="0 0 24 24"
  fill="none"
  stroke="#c71585"
  stroke-width="1.5"
  stroke-linecap="round"
  stroke-linejoin="round"
>
  <path d="M8 8h-2a2 2 0 0 0 -2 2v4a2 2 0 0 0 2 2h2v-4h-1" />
  <path d="M12 8v8" />
  <path d="M16 12h3" />
  <path d="M20 8h-4v8" />
</svg>

$ vips gifsave image.svg image.gif --background none
$ vips gifsave image.svg image.gif --background transparent
$ vips gifsave image.svg image.gif --background white

$ identify -verbose image.gif | awk /Colors:/,/Colormap/
  Colors: 9
  Histogram:
           903: (76,105,113,0) #4C697100 srgba(76,105,113,0)
             4: (198,20,132,255) #C61484FF srgba(198,20,132,1)
             2: (198,20,133,255) #C61485FF srgba(198,20,133,1)
             6: (198,21,132,255) #C61584FF srgba(198,21,132,1)
             5: (198,21,133,255) #C61585FF srgba(198,21,133,1)
             2: (199,20,132,255) #C71484FF srgba(199,20,132,1)
             3: (199,20,133,255) #C71485FF srgba(199,20,133,1)
             7: (199,21,132,255) #C71584FF srgba(199,21,132,1)
            92: (199,21,133,255) #C71585FF MediumVioletRed
  Colormap entries: 16