SVGのパスに沿ってグラデーションを適用することはできますか？

<svg version="1.1" baseProfile="full" xmlns="http://www.w3.org/2000/svg"
        width="100" height="100">
        <defs>
            <linearGradient id="grad1">
                <stop offset="0%" stop-color="red"/>
                <stop offset="100%" stop-color="red" stop-opacity="0" />
            </linearGradient>
        </defs>
        <path d="M50 10  A40 40 0 1 0 90 50"
            stroke="url(#grad1)" stroke-width="10" fill="transparent"/>
    </svg>

.loader {
  --size: 7.5rem;
  --stroke-size: .5rem;
  --diff: calc(calc(var(--size)/2) - var(--stroke-size));
  background-image: conic-gradient(transparent 25%, red);
  width: var(--size);
  height: var(--size);
  border-radius: 50%;
  -webkit-mask:radial-gradient(circle var(--diff),transparent 98%,#fff 100%);
          mask:radial-gradient(circle var(--diff),transparent 98%,#fff 100%);
  animation: rotate 1.2s linear infinite;
  margin: 0 auto;
}
@keyframes rotate {
  from {
    transform: rotate(0);
  }
  to {
    transform: rotate(1turn);
  }
}
body {
  background: #f9fcfc url(https://picsum.photos/id/22/1323/880) 100% /cover;
  margin: 0;
  min-height: 100vh;
  padding-top: 2.5rem;
}
 * { box-sizing: border-box; }

<div class="loader"></div>