This specific naming format is typically used by content aggregators and download managers. It signifies a high-quality rip of a finale, often packaged for viewers who prefer offline viewing. If you are looking for the series itself on GateCima, searching for "Imikuot" or looking through their recent "completed" series section will likely lead you to the streaming page.
Based on the naming convention, here are the key details for this specific file:
Imikuot (likely a transliteration or shortened name for an anime series).
13 (identified as the series finale or season "End"). Quality: 1080p Full HD resolution.