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v3.24.3

Basis of preparation, significant judgments, and accounting policies, Segment Reporting (Details) | 9 Months Ended
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Sep. 30, 2024 Segment
Segment reporting [Abstract] |
Number of segments | 1

X
- Definition Number of segments reported by the entity. + References No definition available. + Details
Name: | ghrs_NumberOfSegment
Namespace Prefix: | ghrs_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | ifrs-full_DisclosureOfOperatingSegmentsAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration