Can I split a gravity forms postcode field by the space so just the first half of the postcode is entered automatically into a text field

reaching out on this one. I’m using gravityforms address field and need a simple text field to display just the first half of the postcode.

Example

Postcode Field: E14 4RD Text Field: E14

No idea where to start I’ve Googled and asked on gravityforms forum but no luck.

Any pointers would be great