Conditional Formatting on multiple rows

Hi All, 

I have a spreadsheet where i need rows to auto 'grey-out' when that row is marked as closed in a cell on the row. 

I have worked out the conditional formatting for a single row but can't seem to apply it to the rest of the spreadsheet unless i manually add the conditional format rule on each row - i am hoping there is a quicker way of doing this since it needs to be applied to the whole sheet of several thousand rows!

I have data in columns A-M for all rows, row G is the identifier of 'CLOSED' where i am basing my conditional formatting and need it to colour all cells within that row from columns A-K.

For single row i am using the formula (=$G$26="CLOSED") to determine if the row should grey out. 

i.e. On row 3, if cell G3 contains the text 'CLOSED', cells A3-K3 colour grey. Simple example screenshot attached:

When i have tried to copy the conditional formatting over all rows, it seems to only link back to one specific cell (i.e. specifically G3) for all rows as opposed to the G cell on the relevant row.

Is there an easier way to do this? 

Thanks in advance for your help 

J