const encodedBase64 = 'R0lGODlhAQABAIAAAAAA...7';
<Image source={{uri: `data:image/gif;base64,${encodedBase64}`}} />
<Image style={{width: 100, height: 50, resizeMode: Image.resizeMode.contain, borderWidth: 1, borderColor: 'red'}} source={{uri: base64Icon}}/>